Hello Deepranjan, DM in Oncology is a three-year super specialty course, which is offered by the following government colleges in India:

Andhra Pradesh:

Sri Venkateswara Institute of Medical Sciences, Tirupati

Nizams Institute of Medical Science, Hyderabad

Delhi:

All India Institute of Medical Sciences, New Delhi

Gujarat:

The Gujarat Cancer & Research Institute, Ahmedabad

Karnataka:

Kidwai Memorial Institute of Oncology, Bangalore

Maharashtra:

Baba Atomic Research Centre, Mumbai

Tata Memorial Centre, Mumbai

Tamil Nadu:

Cancer Institute College of Oncological Sciences, Chennai

Madras Medical College, Chennai

All colleges are very good for doing oncology course. Choice is yours.
Hope it helps
Regards
Dr Parmanand Agarwal
MBBS MD
Career counsellor.